LIFE NEREiDE is an EU funded Project aiming to the implementation of new low noise surfaces made of recycled materials as rubber from end of life tyres (ELTs) and recycled asphalts (RAP). The objective is to mitigate noise exposure with green technologies achieving better acoustical, psichoacoustical and safety properties. This paper is focused on reporting results of ante operam noise measurement campaign carried out within the first period on the different stretches of implementation of new pavements and to show pro and cons of selected indicators and measurement protocols. Results are reported according to different parameters: CPX values, environmental noise values at roadside in terms of different indicators and SPB values with a new method for urban pass by. In fact, a side objective is to establish methods to evaluate pavements efficiency with methods that can be easily implemented in urban context. In particular, a new protocol for urban Pass-By has been developed in order to produce similar index to SPB as established in ISO 11819-1 without the need of manned measurements. This method showed a good agreement with measured noise levels and provided models for each vehicle category that are able to establish the contribution of each one and therefore to allow the evaluation of the pavements. The analysis allows also establishing that the ante operam noisiness of the first site with six stretches is quite homogeneous. Not only CPX values are comparable but also environmental noise values are similar. Therefore, mitigations will influence the noisiness of the sites depending on relative flows; influence of each new pavement can be evaluated as ante/post differential values starting from a homogeneous pavement and site condition (no relevant differences depending on weather, ground effects and road profile were found at least on ante operam values).
Ante operam noise monitoring within LIFE NEREiDE: methods and results
Licitra G.;ASCARI E;
2018
Abstract
LIFE NEREiDE is an EU funded Project aiming to the implementation of new low noise surfaces made of recycled materials as rubber from end of life tyres (ELTs) and recycled asphalts (RAP). The objective is to mitigate noise exposure with green technologies achieving better acoustical, psichoacoustical and safety properties. This paper is focused on reporting results of ante operam noise measurement campaign carried out within the first period on the different stretches of implementation of new pavements and to show pro and cons of selected indicators and measurement protocols. Results are reported according to different parameters: CPX values, environmental noise values at roadside in terms of different indicators and SPB values with a new method for urban pass by. In fact, a side objective is to establish methods to evaluate pavements efficiency with methods that can be easily implemented in urban context. In particular, a new protocol for urban Pass-By has been developed in order to produce similar index to SPB as established in ISO 11819-1 without the need of manned measurements. This method showed a good agreement with measured noise levels and provided models for each vehicle category that are able to establish the contribution of each one and therefore to allow the evaluation of the pavements. The analysis allows also establishing that the ante operam noisiness of the first site with six stretches is quite homogeneous. Not only CPX values are comparable but also environmental noise values are similar. Therefore, mitigations will influence the noisiness of the sites depending on relative flows; influence of each new pavement can be evaluated as ante/post differential values starting from a homogeneous pavement and site condition (no relevant differences depending on weather, ground effects and road profile were found at least on ante operam values).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
